Lingo建模语言与实例4

longde

目标与约束段
集合段（SETS    ENDSETS）
数据段（DATA   ENDDATA）
* [4 n4 `/ I; p; r6 K初始段（INIT  ENDINIT）
（计算段 (CALC ENDCALC)）
MODEL:
Title Location Problem;
sets:
    demand/1..6/:a,b,d;
8 G$ b& D/ {- ?& P1 d1 C    supply/1..2/:x,y,e;
    link(demand,supply):c;
. A: z7 {5 R, v0 A8 M, }" J( }8 mendsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
" o5 o6 v- t6 N$ Wb=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11; e=20,20;
enddata
6 s2 v" j5 D0 h' ?1 {% C: Binit:
x,y=5,1,2,7;
' H6 l8 X+ n# n" c! M/ Nendinit
min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i)sum(supply(j):c(i,j))=d(i););
@for(supply(i)sum(demand(j):c(j,i))<=e(i););
6 t5 N" T& F. T# S% jEND

longde

好
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